№ 20 Алгебра = № 20 Математика
Виконайте множення:
1) p(x – 2);
2) –c(m – 4);
3) x(c – 3 – d).
Розв'язок:
1) p(x – 2) = p ⋅ x – p ⋅ 2 = px − 2p;
2) –c(m – 4) = −c ⋅ m + c ⋅ 4 = −cm + 4c;
3) x(c – 3 – d) = x ⋅ c – x ⋅ 3 – x ⋅ d = xc − 3x − xd.
№ 20 Алгебра = № 20 Математика
1) p(x – 2);
2) –c(m – 4);
3) x(c – 3 – d).
1) p(x – 2) = p ⋅ x – p ⋅ 2 = px − 2p;
2) –c(m – 4) = −c ⋅ m + c ⋅ 4 = −cm + 4c;
3) x(c – 3 – d) = x ⋅ c – x ⋅ 3 – x ⋅ d = xc − 3x − xd.